• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1874-1880
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• 2011

In this paper, sensitivity analysis of the pantograph for the high-speed Train was conducted using finite element analysis method. Dynamic interaction of catenary-pantograph model was simulated by using a commercial finite element analysis software, SAMCEF. Pantograph was assumed to be three degree of freedom mass-spring-damper model and the pre-sag of the contact and messenger wire was implemented due to gravity. The span data of the actual high-speed line and specification of pantograph for high-speed train was applied in the analysis model, respectively. The reliability of the simulation model is verified by comparing the contact force results of simulation and test. Through the simulation, mean contact force and its deviation was evaluated and then sensitivity of the pantograph was analyzed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.307-309
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• 2006

There are operated the six thousand train in the interior of a country. 95% of them are possible usage of resuscitation. Especially, Among them VVVF-Inverter vehicle has a merit of the highest recycle rate. but we don't use a apt recycled energy. Although the existing recycle energy used inverter method supply with electric power, it is decided in accordance with the state of sources. So efficiency of recycled electric power is of poor quality and catenary-voltage-fluctuation be generate because of recycled electric power. and it is able to affect system of safety train service. We'll research the method of supply according to wire condition after storing recycle energy made during train's stopping relation to Advanced EMU Research. Those methods are divided SMES, Fly-Wheel and Supercapacitor, and Considering the both economical efficiency and system application, we'll develop recycle energy storage system suitable our country condition.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.319-320
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• 2006

At this study, one of the electrical problems, arc characteristics according to loss of contact between a pantograph and a catenary, was analyzed. A characteristic of arc current is disappeared in a short period of time. Nevertheless, it has large current same as a surge, so that it has EMI/EMC problems. In the case of the electrical railway system, there is oscillation and de-wiring. The are current is generated by these problems. The result of this study can be used as a facility design to prevent a surge and needs to prove through actual field data in the main circuit of an electric train for a precise analysis about effect of are.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1205_1206
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• 2009

고속철도 전차선로에 설치된 드롭퍼의 와이어가 파단되어 원인을 분석하기 위해 드롭퍼의 구간별/설치위치별/지역별 단선현황 분석, 파단면 SEM(Scanning Electron Microscope) 분석, 미세조직 분석 및 드롭퍼에 작용하는 정적하중을 계산하였다. 또한 고속철도 전차선로에서 드롭퍼의 정적 및 동적하중 측정과 분석을 통하여 드롭퍼의 피로하중 특성을 확인하였고, 지지점의 압상량을 측정 및 분석하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.595-601
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• 2004

The pantograph for Korean High Speed Train was developed and had been evaluating by through 'G7-R&D project' for home grown high speed train technology. In this paper, from the point of view in mechanical aspect, comparison study on the current collection characteristics between the KHST pantograph and contact wire in catenary system on the High-Speed Line and Ho-Nam/Kyoung-Bu conventional lines is conducted. A measuring system for the performance and mechanical characteristics of the KHST pantograph is used for this study, which was developed and installed on the Proto-type Korean High Speed Train, and physical characteristics were measured while the KHST runs on the High-Speed Line and conventional lines. Through this study, remarkable variations of characteristics which can affect to a current collection quality of high-speed train are found and analyzed from measured mean contact forces in both tracks.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.692-697
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• 2007

The current collection system, pantograph, is one of the important subsystems in electric train system, because of it's fatal function and role of supplying power to the train system. Generally, the function of current collection system is evaluated by loss of contact rate between pantograph and contact wire in catenary by measuring arcs, or by statistical method of evaluating minimum mean contact force. The Korean Tiling Train(TTX) has been manufactured by KRRI and Korean domestic companies and is preparing the trial running test of itself. In this paper, we introduce our successful achievement, measuring system and applied methods of dynamic characteristics for the tilting pantograph, developed of by our own technology.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1995년도 추계학술대회논문집; 한국종합전시장, 24 Nov. 1995
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• pp.142-147
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• 1995

Dynamic characteristics of current collection system is one of the major factors which decide the performance of high speed train. To find good design parameters of the current collection system design guide is prepared through the engineering analysis in this study. The analysis starts from the statics of catenary system which results in the sinusoidal variation of stiffness, which is inherently nonlinear Mathieu equation. Simple physical models of rigid trolley wire and Mathieu equation are considered. To simulate the dynamic response of current collection system, numerical integration based on central difference method and modal analysis are presented. The calculated results of central difference method show superior to those of Euler based algorithm.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.1071-1072
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• 2008

본 논문에서는 고속철도 전차선로 드롭퍼 와이어의 파단현상에 대해 분석을 통하여 철도운행의 안정성 향상을 위한 기초연구를 수행하였다. 300km/h로 주행하는 KTX의 판토그래프와 전차선이 직접 접촉하면서 발생되는 기계적 피로도의 누적으로 인한 증가로 경부고속선 전차선로 시스템의 장애사고 예방을 목적으로 하고 있다. 추후, 고속철도 전차선로 드롭퍼 수명한계 측정으로 유지보수관리 체계 효율화와 분석된 파단원인을 바탕으로 드롭퍼 구조개선 방안을 마련하여 합리적 개량방안 수립을 하고자 한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.660-664
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• 2005

There are operated the six thousand train in the interior of a country, $95\%$ of them are possible usage of resuscitation, Especially, Among them VVVF-Inverter vehicle has a merit of the highest recycle rate, but we don't use a apt recycled energy. Although the existing recycle energy used inverter method supply with electric power, it is decided in accordance with the state of sources. So efficiency of recycled electric power is of poor quality and catenary-voltage-fluctuation be generate because of recycled electric power. and it is able to affect system of safety train service. We'll research the method of supply according to wire condition after storing recycle energy made during train's stopping relation to Advanced EMU Research. Those methods are divided SMES, Fly-Wheel and Supercapacitor. and Considering the both economical efficiency and system application, we'll develop recycle energy storage system suitable our country condition.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.723-730
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• 2006

In the electrical railway, the tension ascension of contact wire is essential to speed up of train and current collection performance of catenary largely depends on the tension. The tension variation rate of the tensioning device used in existing line limits within 5%, and the tension variation rate of the spring-type tensioning device installed at the section where tensioning length is short bounds within 15%. So it is urgent for us to localize it for high speed line, which the tension variation rate is limited within 3%. Therefore in this study, a pulley-type tensioning device for high speed line is developed. To verify the performance of developed device, a performance test, overload test and failure test is carried out under the code of the Kyung-Bu High Speed line. And it is secured durability performance through a fatigue test.